Integral sheet-piling



C. C. CONKLING AND C. 8. BOARDMAN. L. C. CONKLING. EXECUTRIX OF C. C. CONKLING DECD.

INTEGRAL SHEET PILING.

APPLICATION FILED JAN. 28, 1919.

1,330,240. Pat en ted Feb. 10,1920.

7 ll WV 4 I J 6 J J 4 67 l \\t Z ATTORNEY UNITED OFFICE.

CLOUD C. CONKLING, DECEASED, LATE OF BUFFALO, NEW YORK, BY LUCILE CONKLIN G, EXECUTRIX, OF BUFFALO, NEW YORK, AND CHARLES S. BOARD- MAN, OF BUFFALO, NEW YORK, ASSIGNORS TO LACKAWANNA STEEL COM- PANY, OF LACKAWANNA, NEW YORK, A CORPORATION OF NEW YORK.

INTEGRAL SHEET-FILING.

Original application filed November 15,

' Our invention relates to steel sheet piling made up of integral rolled-elements or pile sections of the general type known as double interlocked which are characterized by having each edge of the web provided with double interlocking members or flailges which act as hooks, and guards and which produce a strong and practically watertight joint.

Our present invention consists'in desire able modifications of this general type of structure whereby we have produced sections having a particularlystrong interlock so as to materially increase the tensile strength of the interlocked piling and also to have a high moment of resistance. To meet the usual requirements of the work, the grooves should be slightly larger than the interlocking n'lembers. to permit of sufficient angular and longitudinal adjustment, also to permit easy driving and to afford space for displaced, or filler, material which assists in making the joint water-tight.

A particular feature of the present invention consists in the arrangement of the interlocking flanges whereby they are disposed to one side of the central axisof the web and further in the provision of opposing shoulders or hook portions upon each of these flanges to engage complemental opposing shoulders or hooks upon the adjacent,

piling membr interlocked therewith. By our improved arrangement with the piling elements interlocked to form a wall, the web portions of the respective pile elements will be non-parallel and-displaced alternately on either side of the central longitudinal axis of the -wall and thereby add materially to the resistance of the wall to lateral stresses.

A further advantageousfeature of our improved piling consists in the peculiar arrangement of the innermost flanges of the interlock whereby in conjunction with .the web port-ion they will form a channel struc- Specification of Letters Patent.

'ing members. surfaces of the flanges 3, 3 are formed of reversed curvature whereby the surfaces thereof are adapted to come in contact at Patented Feb. 10, 1920.

1911, Serial No. 660,407. Divided and this applioation filed January 28, 1919. Serial No. 273,623.

ture of substantially full depth of the interlock or of the assembled wall. The present application is a division of our application for Letters Patent 660,407 filed Nov. 15, 1911.

The aforesaid and other features of our angular adjustment. Fig. 2 is a sectional view corresponding to a plan View of the members'illustrated in Fig. 1.

Referring to.the drawing, 1 indicates the web portion of a piling member which is flanges 3 and 4, members 3 being as shown of slightly curvedform and arranged substantially in alinc'ment with the web portion 1 and provided at their free edges with laterally extending shoulders or hooks 5 which are outwardlydirected to react with opposing shoulders of an adjacent section to effect the interlock. tegrally formed and provided with inwardly directed locking extensions or hooks 6 adapted for interlocking engagement with the hooks 5 of the complemental flanges 4 of the adjacent section. As indicated, the opposed or engaging surfaces of the hook portions approach closely a line drawn. at a right angle, to the plane of the web with "the result that there is practically a direct The inner flanges 4, 4 are inprovided on each edge with two interlocking resistance to longitudinal strain on the pil- Also as illustrated, the inner the same time as the opposed hook portions whereby additional tensional resistance is obtained in the interlock. The groove or pockets 7 formed between the opposing surfaces of the respective flanges 3 and tare, as indicated, substantially larger than the enlargements or hooks of the adjacent pile members received therein, thereby to afford the requisite freedom for driving and also to provide a suitable space or pocket for the accumulation therein of grouting or other material thereby to contribute to the Water tightness of the interlock.

vantage 'm'ent whereby each As will be readily appreciated, in the arrangement as shown wherein there are two shoulders or hooks on each interlock, together with the reversed curved inner surfaces of the flanges 3, opposing longitudinal separationof the members there is obtained an interlock which is particularly strong in resisting separation and further by reason of the engaging surfaces of the hooks being at a comparatively large angle to the axis of the web the leverage on the hooks is materially reduced and therein great strength is obtained. It will further be noted that the inner flanges 4: combined with the web portion 1 form a channel section which is substantially the full width of the wall and of the interlocks v and of substantial depth whereby each piling member taken separ tely will have substantial resistance to let eral'bending action.

Incidental tothis peculiar arrangement, it will be noted that the web portions, are alternately arranged to each side of the neutral axis of the wall, thereby locating the greater portion of the metal at the maximum distance from the neutral axis of the wall so as to obtain the greatest tensile strength thereof and to produce a wall which is particularly strong in its'resistance to" lateral stresses. The described arrangement of the pile which is of substantial strength with reference to-the lateral resistance is also advantageous in that it correspondingly stiffens the pile as a column during driving. Moreover, the interlocking joints are of substantial strength closely approximating the tensile strength of the web itself. A further important feature resides in the arrange I I interlock provides three surfaces of contact which add to the water tightness and also possess the further .ad-

of the two pockets 7, 7 which will which will then act to further contribute to entrap filling material seal the interlocks and V the water tightness thereof.

One trouble somet' es found with certain types of piling, heretofore, has been that there was not suflicient metal in the section to withstand the'impact of driving and the interlocking joints subjected to longitudinal 1 and transverse stresses were weak, but with our designs the web can be made very light and at the same time the section will have sufficient area to withstand the impact of driving and the joint will be very strong not only superior to the light piling here referred to but superior to many of the heavy 7 rolled types. This particular form therefore has the advantages ofeconomy of metal,

simplicity of manufacture, facilities for driv ing and the three points of contact; particularly the long reverse curve on the inner side of the long hook gives great strength and exceptional water tightness.

Having described our invention we claim A sheet piling section comprising a web and on each edge thereof two interlocking members each having a shank and a laterally elongated head, one member being longer than the other and provided on one side with a surface of reversed curvature to engage a corresponding surface of the similar member of an adjacent section to oppose longitudinal movement of the section and the head portion of saidlonger members being formed to provide shoulders'outwardly directed and the shorter of the members being arranged relative to the larger member to provide a socket elongated in the plane of the web to receive the head portion of the larger member of an adjacent section and having a shoulder to oppose the shoulder of the latter member and said shorter members having their inwardly directed sides substantially straight and combining with the web portion in formin a channel struc 'ture approximating the width of the piling section substantially as described.

In testimony. whereof we have signed our names to this specification, this .7 day of January, 1919.

v LUCILE o, CQNKLING, I Emccutrim of Cloud 0. Gonkling, deceased.

CHARLES s. BOARDMAN. 

